/* =========================================
   MATERIALS PAGES - Matching Design System
   ========================================= */

.materials-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* =========================================
   PAGE HEADER
   ========================================= */
.page-header {
    text-align: center;
    margin: 3rem 0 2rem;
    padding: 0 1rem;
}

.page-header h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.page-header h1 .highlight {
    background: linear-gradient(135deg, var(--primary-400), var(--accent-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* =========================================
   CONTROLS
   ========================================= */
.controls-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 3rem;
    padding: 0 1rem;
}

.search-container {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.search-input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    background: rgba(28, 25, 23, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-main);
    transition: all 0.2s ease;
    box-sizing: border-box;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

/* =========================================
   MATERIALS GRID
   ========================================= */
.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    padding: 0 1rem 4rem;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.material-card {
    background: rgba(28, 25, 23, 0.62);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 1.25rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    min-height: 204px;
    position: relative;
    overflow: hidden;
}

/* Gradient border on hover */
.material-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 12px;
    padding: 1px;
    background: linear-gradient(135deg, transparent, transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    transition: background 0.4s ease;
}

.material-card:hover::before {
    background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
}

.material-card:hover {
    transform: translateY(-2px);
    background: rgba(28, 25, 23, 0.76);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.28);
}

/* =========================================
   CARD CONTENT
   ========================================= */
.card-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 112px;
    align-items: flex-start;
    margin-bottom: 0.75rem;
    gap: 0.75rem;
    min-height: 4.9rem;
}

.card-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.4rem;
    width: 112px;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.3;
    min-width: 0;
    min-height: 4.9rem;
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.card-badge {
    font-size: 0.7rem;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    background: rgba(20, 184, 166, 0.1);
    border: 1px solid rgba(20, 184, 166, 0.2);
    color: var(--accent-400);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.card-badge--success {
    background: rgba(16, 185, 129, 0.15);
    border-color: rgba(16, 185, 129, 0.25);
    color: var(--success);
}

.card-badge--progress {
    background: rgba(59, 130, 246, 0.14);
    border-color: rgba(59, 130, 246, 0.24);
    color: #93c5fd;
}

.card-concept {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--primary-400);
    margin-bottom: 1rem;
    opacity: 0.8;
    min-height: 1.2rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.card-meta {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-disabled);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.meta-item.meta-item-end {
    margin-left: auto;
}

/* =========================================
   DETAIL PAGE
   ========================================= */
.materials-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 2rem 3rem 4rem;
    width: 100%;
    position: relative;
    z-index: 1;
}

/* =========================================
   BREADCRUMBS
   ========================================= */
.breadcrumbs {
    margin-bottom: 2rem;
    display: flex;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.breadcrumbs a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    background: rgba(28, 25, 23, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.breadcrumbs a:hover {
    color: var(--text-primary);
    background: rgba(28, 25, 23, 0.7);
    border-color: var(--border-default);
}

.breadcrumbs a i {
    width: 16px;
    height: 16px;
}

/* =========================================
   MATERIAL DETAIL CARD
   ========================================= */
.material-detail-card {
    background: rgba(28, 25, 23, 0.72);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-subtle);
    border-radius: 14px;
    padding: 2.25rem;
    position: relative;
    overflow: hidden;
}

/* Gradient border effect */
.material-detail-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 14px;
    padding: 1px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(20, 184, 166, 0.3));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

/* =========================================
   MATERIAL HEADER
   ========================================= */
.material-header {
    margin-bottom: 2rem;
}

.material-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.material-type-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.85rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    background: rgba(20, 184, 166, 0.15);
    color: var(--accent-400);
    border: 1px solid rgba(20, 184, 166, 0.3);
}

.material-header h1 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin: 0;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.material-meta {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 0.75rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.material-progress-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
}

.material-progress-note {
    margin-top: 1rem;
    padding: 0.9rem 1rem;
    border-radius: 12px;
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(59, 130, 246, 0.22);
    color: #cbd5f5;
    line-height: 1.55;
}

.material-progress-note--done {
    background: rgba(16, 185, 129, 0.12);
    border-color: rgba(16, 185, 129, 0.24);
    color: #bbf7d0;
}

/* =========================================
   MATERIAL BODY
   ========================================= */
.material-body {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.material-body.markdown-content {
    opacity: 0;
    transition: opacity 0.1s ease-in-out;
}

/* Markdown content styling */
.material-body.markdown-content h1,
.material-body.markdown-content h2,
.material-body.markdown-content h3 {
    color: var(--text-primary);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.material-body.markdown-content h2 {
    font-size: 1.4rem;
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: 0.5rem;
}

.material-body.markdown-content h3 {
    font-size: 1.2rem;
}

.material-body.markdown-content p {
    margin-bottom: 1rem;
}

.material-body.markdown-content ul,
.material-body.markdown-content ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.material-body.markdown-content li {
    margin-bottom: 0.5rem;
}

.material-body.markdown-content code {
    font-family: var(--font-mono);
    background: rgba(0, 0, 0, 0.3);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.9em;
}

.material-body.markdown-content pre {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 1rem;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.material-body.markdown-content pre code {
    background: transparent;
    padding: 0;
}

.material-body.markdown-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.material-body.markdown-content .material-source {
    margin-top: 2rem;
    padding: 1rem 1.1rem;
    border: 1px solid rgba(45, 212, 191, 0.2);
    border-left: 3px solid var(--accent-cyan);
    border-radius: 8px;
    background: rgba(45, 212, 191, 0.06);
    color: var(--text-secondary);
}

.material-body.markdown-content .material-source h2 {
    margin-top: 0;
    border-bottom: 0;
    padding-bottom: 0;
    font-size: 1rem;
}

.material-body.markdown-content .material-source p,
.material-body.markdown-content .material-source ul {
    margin-bottom: 0.75rem;
}

.material-body.markdown-content .material-source li:last-child,
.material-body.markdown-content .material-source ul:last-child {
    margin-bottom: 0;
}

/* =========================================
   EMPTY STATE
   ========================================= */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 1rem;
    color: var(--text-muted);
}

#noResults {
    display: none;
}

.empty-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-icon i {
    width: 48px;
    height: 48px;
}

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 768px) {
    .page-header {
        margin: 2rem 0 1.5rem;
    }
    
    .materials-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 0 1rem 2rem;
    }
    
    .material-card {
        padding: 1.25rem;
        min-height: 196px;
    }

    .card-header {
        grid-template-columns: minmax(0, 1fr) 104px;
        min-height: 4.65rem;
    }

    .card-badges {
        width: 104px;
    }

    .card-title {
        min-height: 4.65rem;
    }
    
    .materials-container {
        padding: 1.5rem 1rem 2rem;
    }
    
    .material-detail-card {
        padding: 1.5rem;
    }

    .material-header-row {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .breadcrumbs {
        flex-wrap: wrap;
    }
}